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YES!!

Started by jtn191, April 28, 2012, 06:27:45 AM

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jtn191

April 28, 2012, 06:27:45 AM Last Edit: April 28, 2012, 07:31:10 PM by jtn191
So I just did my first SMD repair...fixed the guitar professor's MXR Carbon Copy by replacing this JFET. Pretty happy 'bout it  ;D

gtr2

#1
April 28, 2012, 10:09:16 AM
Congrats!

I had to replace a potentiometer on one.  It was a chore!

Josh
1776 EFFECTS STORE     
Contract PCB designer

jimmybjj

#2
April 28, 2012, 01:08:23 PM
great job!!! thats a really packed board how did you trace down the transistor?
Pcbs no longer available

bigmufffuzzwizz

#3
April 28, 2012, 05:32:01 PM
Quote from: jimmybjj on April 28, 2012, 01:08:23 PM
great job!!! thats a really packed board how did you trace down the transistor?

Exactly my thoughts. I've attempted to fix a few SMD pedals and they always make my head hurt when I open them.
Owner and operator of Magic Pedals

jtn191

#4
April 28, 2012, 07:30:41 PM
I looked up the problem on FSB and it seems to be pretty common with Carbon Copies: LED doesn't turn on and there's no sound when engaged. Somebody posted a pic on flickr pointing out 4 J177 Jfets and I emailed Dunlop just to make sure. They said usually just Q10 is the problem, so BAM replaced it using tweezers and it works
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